1 // SPDX-License-Identifier: LGPL-2.1 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002, 2011 5 * Etersoft, 2012 6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org), 7 * Steve French (sfrench@us.ibm.com) 8 * 9 */ 10 #include <linux/fs.h> 11 #include <linux/stat.h> 12 #include <linux/slab.h> 13 #include <linux/pagemap.h> 14 #include <asm/div64.h> 15 #include "cifsfs.h" 16 #include "cifspdu.h" 17 #include "cifsglob.h" 18 #include "cifsproto.h" 19 #include "cifs_debug.h" 20 #include "cifs_fs_sb.h" 21 #include "cifs_unicode.h" 22 #include "fscache.h" 23 #include "smb2glob.h" 24 #include "smb2pdu.h" 25 #include "smb2proto.h" 26 #include "cached_dir.h" 27 #include "smb2status.h" 28 29 static void 30 free_set_inf_compound(struct smb_rqst *rqst) 31 { 32 if (rqst[1].rq_iov) 33 SMB2_set_info_free(&rqst[1]); 34 if (rqst[2].rq_iov) 35 SMB2_close_free(&rqst[2]); 36 } 37 38 /* 39 * note: If cfile is passed, the reference to it is dropped here. 40 * So make sure that you do not reuse cfile after return from this func. 41 * 42 * If passing @out_iov and @out_buftype, ensure to make them both large enough 43 * (>= 3) to hold all compounded responses. Caller is also responsible for 44 * freeing them up with free_rsp_buf(). 45 */ 46 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, 47 struct cifs_sb_info *cifs_sb, const char *full_path, 48 __u32 desired_access, __u32 create_disposition, __u32 create_options, 49 umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile, 50 __u8 **extbuf, size_t *extbuflen, 51 struct kvec *out_iov, int *out_buftype) 52 { 53 struct smb2_compound_vars *vars = NULL; 54 struct kvec *rsp_iov; 55 struct smb_rqst *rqst; 56 int rc; 57 __le16 *utf16_path = NULL; 58 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 59 struct cifs_fid fid; 60 struct cifs_ses *ses = tcon->ses; 61 struct TCP_Server_Info *server; 62 int num_rqst = 0; 63 int resp_buftype[3]; 64 struct smb2_query_info_rsp *qi_rsp = NULL; 65 struct cifs_open_info_data *idata; 66 int flags = 0; 67 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0}; 68 unsigned int size[2]; 69 void *data[2]; 70 int len; 71 72 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 73 if (vars == NULL) 74 return -ENOMEM; 75 rqst = &vars->rqst[0]; 76 rsp_iov = &vars->rsp_iov[0]; 77 78 server = cifs_pick_channel(ses); 79 80 if (smb3_encryption_required(tcon)) 81 flags |= CIFS_TRANSFORM_REQ; 82 83 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 84 85 /* We already have a handle so we can skip the open */ 86 if (cfile) 87 goto after_open; 88 89 /* Open */ 90 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 91 if (!utf16_path) { 92 rc = -ENOMEM; 93 goto finished; 94 } 95 96 vars->oparms = (struct cifs_open_parms) { 97 .tcon = tcon, 98 .path = full_path, 99 .desired_access = desired_access, 100 .disposition = create_disposition, 101 .create_options = cifs_create_options(cifs_sb, create_options), 102 .fid = &fid, 103 .mode = mode, 104 .cifs_sb = cifs_sb, 105 }; 106 107 rqst[num_rqst].rq_iov = &vars->open_iov[0]; 108 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE; 109 rc = SMB2_open_init(tcon, server, 110 &rqst[num_rqst], &oplock, &vars->oparms, 111 utf16_path); 112 kfree(utf16_path); 113 if (rc) 114 goto finished; 115 116 smb2_set_next_command(tcon, &rqst[num_rqst]); 117 after_open: 118 num_rqst++; 119 rc = 0; 120 121 /* Operation */ 122 switch (command) { 123 case SMB2_OP_QUERY_INFO: 124 rqst[num_rqst].rq_iov = &vars->qi_iov; 125 rqst[num_rqst].rq_nvec = 1; 126 127 if (cfile) 128 rc = SMB2_query_info_init(tcon, server, 129 &rqst[num_rqst], 130 cfile->fid.persistent_fid, 131 cfile->fid.volatile_fid, 132 FILE_ALL_INFORMATION, 133 SMB2_O_INFO_FILE, 0, 134 sizeof(struct smb2_file_all_info) + 135 PATH_MAX * 2, 0, NULL); 136 else { 137 rc = SMB2_query_info_init(tcon, server, 138 &rqst[num_rqst], 139 COMPOUND_FID, 140 COMPOUND_FID, 141 FILE_ALL_INFORMATION, 142 SMB2_O_INFO_FILE, 0, 143 sizeof(struct smb2_file_all_info) + 144 PATH_MAX * 2, 0, NULL); 145 if (!rc) { 146 smb2_set_next_command(tcon, &rqst[num_rqst]); 147 smb2_set_related(&rqst[num_rqst]); 148 } 149 } 150 151 if (rc) 152 goto finished; 153 num_rqst++; 154 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid, 155 full_path); 156 break; 157 case SMB2_OP_POSIX_QUERY_INFO: 158 rqst[num_rqst].rq_iov = &vars->qi_iov; 159 rqst[num_rqst].rq_nvec = 1; 160 161 if (cfile) 162 rc = SMB2_query_info_init(tcon, server, 163 &rqst[num_rqst], 164 cfile->fid.persistent_fid, 165 cfile->fid.volatile_fid, 166 SMB_FIND_FILE_POSIX_INFO, 167 SMB2_O_INFO_FILE, 0, 168 /* TBD: fix following to allow for longer SIDs */ 169 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) + 170 (sizeof(struct cifs_sid) * 2), 0, NULL); 171 else { 172 rc = SMB2_query_info_init(tcon, server, 173 &rqst[num_rqst], 174 COMPOUND_FID, 175 COMPOUND_FID, 176 SMB_FIND_FILE_POSIX_INFO, 177 SMB2_O_INFO_FILE, 0, 178 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) + 179 (sizeof(struct cifs_sid) * 2), 0, NULL); 180 if (!rc) { 181 smb2_set_next_command(tcon, &rqst[num_rqst]); 182 smb2_set_related(&rqst[num_rqst]); 183 } 184 } 185 186 if (rc) 187 goto finished; 188 num_rqst++; 189 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path); 190 break; 191 case SMB2_OP_DELETE: 192 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path); 193 break; 194 case SMB2_OP_MKDIR: 195 /* 196 * Directories are created through parameters in the 197 * SMB2_open() call. 198 */ 199 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path); 200 break; 201 case SMB2_OP_RMDIR: 202 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 203 rqst[num_rqst].rq_nvec = 1; 204 205 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ 206 data[0] = &delete_pending[0]; 207 208 rc = SMB2_set_info_init(tcon, server, 209 &rqst[num_rqst], COMPOUND_FID, 210 COMPOUND_FID, current->tgid, 211 FILE_DISPOSITION_INFORMATION, 212 SMB2_O_INFO_FILE, 0, data, size); 213 if (rc) 214 goto finished; 215 smb2_set_next_command(tcon, &rqst[num_rqst]); 216 smb2_set_related(&rqst[num_rqst++]); 217 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path); 218 break; 219 case SMB2_OP_SET_EOF: 220 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 221 rqst[num_rqst].rq_nvec = 1; 222 223 size[0] = 8; /* sizeof __le64 */ 224 data[0] = ptr; 225 226 if (cfile) { 227 rc = SMB2_set_info_init(tcon, server, 228 &rqst[num_rqst], 229 cfile->fid.persistent_fid, 230 cfile->fid.volatile_fid, 231 current->tgid, 232 FILE_END_OF_FILE_INFORMATION, 233 SMB2_O_INFO_FILE, 0, 234 data, size); 235 } else { 236 rc = SMB2_set_info_init(tcon, server, 237 &rqst[num_rqst], 238 COMPOUND_FID, 239 COMPOUND_FID, 240 current->tgid, 241 FILE_END_OF_FILE_INFORMATION, 242 SMB2_O_INFO_FILE, 0, 243 data, size); 244 if (!rc) { 245 smb2_set_next_command(tcon, &rqst[num_rqst]); 246 smb2_set_related(&rqst[num_rqst]); 247 } 248 } 249 if (rc) 250 goto finished; 251 num_rqst++; 252 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path); 253 break; 254 case SMB2_OP_SET_INFO: 255 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 256 rqst[num_rqst].rq_nvec = 1; 257 258 259 size[0] = sizeof(FILE_BASIC_INFO); 260 data[0] = ptr; 261 262 if (cfile) 263 rc = SMB2_set_info_init(tcon, server, 264 &rqst[num_rqst], 265 cfile->fid.persistent_fid, 266 cfile->fid.volatile_fid, current->tgid, 267 FILE_BASIC_INFORMATION, 268 SMB2_O_INFO_FILE, 0, data, size); 269 else { 270 rc = SMB2_set_info_init(tcon, server, 271 &rqst[num_rqst], 272 COMPOUND_FID, 273 COMPOUND_FID, current->tgid, 274 FILE_BASIC_INFORMATION, 275 SMB2_O_INFO_FILE, 0, data, size); 276 if (!rc) { 277 smb2_set_next_command(tcon, &rqst[num_rqst]); 278 smb2_set_related(&rqst[num_rqst]); 279 } 280 } 281 282 if (rc) 283 goto finished; 284 num_rqst++; 285 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid, 286 full_path); 287 break; 288 case SMB2_OP_RENAME: 289 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 290 rqst[num_rqst].rq_nvec = 2; 291 292 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); 293 294 vars->rename_info.ReplaceIfExists = 1; 295 vars->rename_info.RootDirectory = 0; 296 vars->rename_info.FileNameLength = cpu_to_le32(len); 297 298 size[0] = sizeof(struct smb2_file_rename_info); 299 data[0] = &vars->rename_info; 300 301 size[1] = len + 2 /* null */; 302 data[1] = (__le16 *)ptr; 303 304 if (cfile) 305 rc = SMB2_set_info_init(tcon, server, 306 &rqst[num_rqst], 307 cfile->fid.persistent_fid, 308 cfile->fid.volatile_fid, 309 current->tgid, FILE_RENAME_INFORMATION, 310 SMB2_O_INFO_FILE, 0, data, size); 311 else { 312 rc = SMB2_set_info_init(tcon, server, 313 &rqst[num_rqst], 314 COMPOUND_FID, COMPOUND_FID, 315 current->tgid, FILE_RENAME_INFORMATION, 316 SMB2_O_INFO_FILE, 0, data, size); 317 if (!rc) { 318 smb2_set_next_command(tcon, &rqst[num_rqst]); 319 smb2_set_related(&rqst[num_rqst]); 320 } 321 } 322 if (rc) 323 goto finished; 324 num_rqst++; 325 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path); 326 break; 327 case SMB2_OP_HARDLINK: 328 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 329 rqst[num_rqst].rq_nvec = 2; 330 331 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); 332 333 vars->link_info.ReplaceIfExists = 0; 334 vars->link_info.RootDirectory = 0; 335 vars->link_info.FileNameLength = cpu_to_le32(len); 336 337 size[0] = sizeof(struct smb2_file_link_info); 338 data[0] = &vars->link_info; 339 340 size[1] = len + 2 /* null */; 341 data[1] = (__le16 *)ptr; 342 343 rc = SMB2_set_info_init(tcon, server, 344 &rqst[num_rqst], COMPOUND_FID, 345 COMPOUND_FID, current->tgid, 346 FILE_LINK_INFORMATION, 347 SMB2_O_INFO_FILE, 0, data, size); 348 if (rc) 349 goto finished; 350 smb2_set_next_command(tcon, &rqst[num_rqst]); 351 smb2_set_related(&rqst[num_rqst++]); 352 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path); 353 break; 354 default: 355 cifs_dbg(VFS, "Invalid command\n"); 356 rc = -EINVAL; 357 } 358 if (rc) 359 goto finished; 360 361 /* We already have a handle so we can skip the close */ 362 if (cfile) 363 goto after_close; 364 /* Close */ 365 flags |= CIFS_CP_CREATE_CLOSE_OP; 366 rqst[num_rqst].rq_iov = &vars->close_iov; 367 rqst[num_rqst].rq_nvec = 1; 368 rc = SMB2_close_init(tcon, server, 369 &rqst[num_rqst], COMPOUND_FID, 370 COMPOUND_FID, false); 371 smb2_set_related(&rqst[num_rqst]); 372 if (rc) 373 goto finished; 374 after_close: 375 num_rqst++; 376 377 if (cfile) { 378 rc = compound_send_recv(xid, ses, server, 379 flags, num_rqst - 2, 380 &rqst[1], &resp_buftype[1], 381 &rsp_iov[1]); 382 } else 383 rc = compound_send_recv(xid, ses, server, 384 flags, num_rqst, 385 rqst, resp_buftype, 386 rsp_iov); 387 388 finished: 389 SMB2_open_free(&rqst[0]); 390 if (rc == -EREMCHG) { 391 pr_warn_once("server share %s deleted\n", tcon->tree_name); 392 tcon->need_reconnect = true; 393 } 394 395 switch (command) { 396 case SMB2_OP_QUERY_INFO: 397 idata = ptr; 398 if (rc == 0 && cfile && cfile->symlink_target) { 399 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 400 if (!idata->symlink_target) 401 rc = -ENOMEM; 402 } 403 if (rc == 0) { 404 qi_rsp = (struct smb2_query_info_rsp *) 405 rsp_iov[1].iov_base; 406 rc = smb2_validate_and_copy_iov( 407 le16_to_cpu(qi_rsp->OutputBufferOffset), 408 le32_to_cpu(qi_rsp->OutputBufferLength), 409 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi); 410 } 411 if (rqst[1].rq_iov) 412 SMB2_query_info_free(&rqst[1]); 413 if (rqst[2].rq_iov) 414 SMB2_close_free(&rqst[2]); 415 if (rc) 416 trace_smb3_query_info_compound_err(xid, ses->Suid, 417 tcon->tid, rc); 418 else 419 trace_smb3_query_info_compound_done(xid, ses->Suid, 420 tcon->tid); 421 break; 422 case SMB2_OP_POSIX_QUERY_INFO: 423 idata = ptr; 424 if (rc == 0 && cfile && cfile->symlink_target) { 425 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 426 if (!idata->symlink_target) 427 rc = -ENOMEM; 428 } 429 if (rc == 0) { 430 qi_rsp = (struct smb2_query_info_rsp *) 431 rsp_iov[1].iov_base; 432 rc = smb2_validate_and_copy_iov( 433 le16_to_cpu(qi_rsp->OutputBufferOffset), 434 le32_to_cpu(qi_rsp->OutputBufferLength), 435 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */, 436 (char *)&idata->posix_fi); 437 } 438 if (rc == 0) { 439 unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength); 440 441 if (length > sizeof(idata->posix_fi)) { 442 char *base = (char *)rsp_iov[1].iov_base + 443 le16_to_cpu(qi_rsp->OutputBufferOffset) + 444 sizeof(idata->posix_fi); 445 *extbuflen = length - sizeof(idata->posix_fi); 446 *extbuf = kmemdup(base, *extbuflen, GFP_KERNEL); 447 if (!*extbuf) 448 rc = -ENOMEM; 449 } else { 450 rc = -EINVAL; 451 } 452 } 453 if (rqst[1].rq_iov) 454 SMB2_query_info_free(&rqst[1]); 455 if (rqst[2].rq_iov) 456 SMB2_close_free(&rqst[2]); 457 if (rc) 458 trace_smb3_posix_query_info_compound_err(xid, ses->Suid, tcon->tid, rc); 459 else 460 trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid); 461 break; 462 case SMB2_OP_DELETE: 463 if (rc) 464 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc); 465 else 466 trace_smb3_delete_done(xid, ses->Suid, tcon->tid); 467 if (rqst[1].rq_iov) 468 SMB2_close_free(&rqst[1]); 469 break; 470 case SMB2_OP_MKDIR: 471 if (rc) 472 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc); 473 else 474 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid); 475 if (rqst[1].rq_iov) 476 SMB2_close_free(&rqst[1]); 477 break; 478 case SMB2_OP_HARDLINK: 479 if (rc) 480 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc); 481 else 482 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid); 483 free_set_inf_compound(rqst); 484 break; 485 case SMB2_OP_RENAME: 486 if (rc) 487 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc); 488 else 489 trace_smb3_rename_done(xid, ses->Suid, tcon->tid); 490 free_set_inf_compound(rqst); 491 break; 492 case SMB2_OP_RMDIR: 493 if (rc) 494 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc); 495 else 496 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid); 497 free_set_inf_compound(rqst); 498 break; 499 case SMB2_OP_SET_EOF: 500 if (rc) 501 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc); 502 else 503 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid); 504 free_set_inf_compound(rqst); 505 break; 506 case SMB2_OP_SET_INFO: 507 if (rc) 508 trace_smb3_set_info_compound_err(xid, ses->Suid, 509 tcon->tid, rc); 510 else 511 trace_smb3_set_info_compound_done(xid, ses->Suid, 512 tcon->tid); 513 free_set_inf_compound(rqst); 514 break; 515 } 516 517 if (cfile) 518 cifsFileInfo_put(cfile); 519 520 if (out_iov && out_buftype) { 521 memcpy(out_iov, rsp_iov, 3 * sizeof(*out_iov)); 522 memcpy(out_buftype, resp_buftype, 3 * sizeof(*out_buftype)); 523 } else { 524 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 525 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 526 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 527 } 528 kfree(vars); 529 return rc; 530 } 531 532 static int parse_create_response(struct cifs_open_info_data *data, 533 struct cifs_sb_info *cifs_sb, 534 const struct kvec *iov) 535 { 536 struct smb2_create_rsp *rsp = iov->iov_base; 537 bool reparse_point = false; 538 u32 tag = 0; 539 int rc = 0; 540 541 switch (rsp->hdr.Status) { 542 case STATUS_IO_REPARSE_TAG_NOT_HANDLED: 543 reparse_point = true; 544 break; 545 case STATUS_STOPPED_ON_SYMLINK: 546 rc = smb2_parse_symlink_response(cifs_sb, iov, 547 &data->symlink_target); 548 if (rc) 549 return rc; 550 tag = IO_REPARSE_TAG_SYMLINK; 551 reparse_point = true; 552 break; 553 case STATUS_SUCCESS: 554 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT); 555 break; 556 } 557 data->reparse_point = reparse_point; 558 data->reparse_tag = tag; 559 return rc; 560 } 561 562 int smb2_query_path_info(const unsigned int xid, 563 struct cifs_tcon *tcon, 564 struct cifs_sb_info *cifs_sb, 565 const char *full_path, 566 struct cifs_open_info_data *data) 567 { 568 __u32 create_options = 0; 569 struct cifsFileInfo *cfile; 570 struct cached_fid *cfid = NULL; 571 struct smb2_hdr *hdr; 572 struct kvec out_iov[3] = {}; 573 int out_buftype[3] = {}; 574 bool islink; 575 int rc, rc2; 576 577 data->adjust_tz = false; 578 data->reparse_point = false; 579 580 if (strcmp(full_path, "")) 581 rc = -ENOENT; 582 else 583 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid); 584 /* If it is a root and its handle is cached then use it */ 585 if (!rc) { 586 if (cfid->file_all_info_is_valid) { 587 memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi)); 588 } else { 589 rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid, 590 cfid->fid.volatile_fid, &data->fi); 591 } 592 close_cached_dir(cfid); 593 return rc; 594 } 595 596 cifs_get_readable_path(tcon, full_path, &cfile); 597 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, 598 create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile, 599 NULL, NULL, out_iov, out_buftype); 600 hdr = out_iov[0].iov_base; 601 /* 602 * If first iov is unset, then SMB session was dropped or we've got a 603 * cached open file (@cfile). 604 */ 605 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 606 goto out; 607 608 switch (rc) { 609 case 0: 610 case -EOPNOTSUPP: 611 rc = parse_create_response(data, cifs_sb, &out_iov[0]); 612 if (rc || !data->reparse_point) 613 goto out; 614 615 create_options |= OPEN_REPARSE_POINT; 616 /* Failed on a symbolic link - query a reparse point info */ 617 cifs_get_readable_path(tcon, full_path, &cfile); 618 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 619 FILE_READ_ATTRIBUTES, FILE_OPEN, 620 create_options, ACL_NO_MODE, data, 621 SMB2_OP_QUERY_INFO, cfile, NULL, NULL, 622 NULL, NULL); 623 break; 624 case -EREMOTE: 625 break; 626 default: 627 if (hdr->Status != STATUS_OBJECT_NAME_INVALID) 628 break; 629 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 630 full_path, &islink); 631 if (rc2) { 632 rc = rc2; 633 goto out; 634 } 635 if (islink) 636 rc = -EREMOTE; 637 } 638 639 out: 640 free_rsp_buf(out_buftype[0], out_iov[0].iov_base); 641 free_rsp_buf(out_buftype[1], out_iov[1].iov_base); 642 free_rsp_buf(out_buftype[2], out_iov[2].iov_base); 643 return rc; 644 } 645 646 int smb311_posix_query_path_info(const unsigned int xid, 647 struct cifs_tcon *tcon, 648 struct cifs_sb_info *cifs_sb, 649 const char *full_path, 650 struct cifs_open_info_data *data, 651 struct cifs_sid *owner, 652 struct cifs_sid *group) 653 { 654 int rc; 655 __u32 create_options = 0; 656 struct cifsFileInfo *cfile; 657 struct kvec out_iov[3] = {}; 658 int out_buftype[3] = {}; 659 __u8 *sidsbuf = NULL; 660 __u8 *sidsbuf_end = NULL; 661 size_t sidsbuflen = 0; 662 size_t owner_len, group_len; 663 664 data->adjust_tz = false; 665 data->reparse_point = false; 666 667 /* 668 * BB TODO: Add support for using the cached root handle. 669 * Create SMB2_query_posix_info worker function to do non-compounded query 670 * when we already have an open file handle for this. For now this is fast enough 671 * (always using the compounded version). 672 */ 673 674 cifs_get_readable_path(tcon, full_path, &cfile); 675 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, 676 create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile, 677 &sidsbuf, &sidsbuflen, out_iov, out_buftype); 678 /* 679 * If first iov is unset, then SMB session was dropped or we've got a 680 * cached open file (@cfile). 681 */ 682 if (!out_iov[0].iov_base || out_buftype[0] == CIFS_NO_BUFFER) 683 goto out; 684 685 switch (rc) { 686 case 0: 687 case -EOPNOTSUPP: 688 /* BB TODO: When support for special files added to Samba re-verify this path */ 689 rc = parse_create_response(data, cifs_sb, &out_iov[0]); 690 if (rc || !data->reparse_point) 691 goto out; 692 693 create_options |= OPEN_REPARSE_POINT; 694 /* Failed on a symbolic link - query a reparse point info */ 695 cifs_get_readable_path(tcon, full_path, &cfile); 696 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, 697 FILE_OPEN, create_options, ACL_NO_MODE, data, 698 SMB2_OP_POSIX_QUERY_INFO, cfile, 699 &sidsbuf, &sidsbuflen, NULL, NULL); 700 break; 701 } 702 703 out: 704 if (rc == 0) { 705 sidsbuf_end = sidsbuf + sidsbuflen; 706 707 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end); 708 if (owner_len == -1) { 709 rc = -EINVAL; 710 goto out; 711 } 712 memcpy(owner, sidsbuf, owner_len); 713 714 group_len = posix_info_sid_size( 715 sidsbuf + owner_len, sidsbuf_end); 716 if (group_len == -1) { 717 rc = -EINVAL; 718 goto out; 719 } 720 memcpy(group, sidsbuf + owner_len, group_len); 721 } 722 723 kfree(sidsbuf); 724 free_rsp_buf(out_buftype[0], out_iov[0].iov_base); 725 free_rsp_buf(out_buftype[1], out_iov[1].iov_base); 726 free_rsp_buf(out_buftype[2], out_iov[2].iov_base); 727 return rc; 728 } 729 730 int 731 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, 732 struct cifs_tcon *tcon, const char *name, 733 struct cifs_sb_info *cifs_sb) 734 { 735 return smb2_compound_op(xid, tcon, cifs_sb, name, 736 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 737 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR, 738 NULL, NULL, NULL, NULL, NULL); 739 } 740 741 void 742 smb2_mkdir_setinfo(struct inode *inode, const char *name, 743 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 744 const unsigned int xid) 745 { 746 FILE_BASIC_INFO data; 747 struct cifsInodeInfo *cifs_i; 748 struct cifsFileInfo *cfile; 749 u32 dosattrs; 750 int tmprc; 751 752 memset(&data, 0, sizeof(data)); 753 cifs_i = CIFS_I(inode); 754 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 755 data.Attributes = cpu_to_le32(dosattrs); 756 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); 757 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, 758 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 759 CREATE_NOT_FILE, ACL_NO_MODE, 760 &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL); 761 if (tmprc == 0) 762 cifs_i->cifsAttrs = dosattrs; 763 } 764 765 int 766 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 767 struct cifs_sb_info *cifs_sb) 768 { 769 drop_cached_dir_by_name(xid, tcon, name, cifs_sb); 770 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 771 CREATE_NOT_FILE, ACL_NO_MODE, 772 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL); 773 } 774 775 int 776 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 777 struct cifs_sb_info *cifs_sb) 778 { 779 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 780 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, 781 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL); 782 } 783 784 static int 785 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 786 const char *from_name, const char *to_name, 787 struct cifs_sb_info *cifs_sb, __u32 access, int command, 788 struct cifsFileInfo *cfile) 789 { 790 __le16 *smb2_to_name = NULL; 791 int rc; 792 793 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 794 if (smb2_to_name == NULL) { 795 rc = -ENOMEM; 796 goto smb2_rename_path; 797 } 798 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access, 799 FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name, 800 command, cfile, NULL, NULL, NULL, NULL); 801 smb2_rename_path: 802 kfree(smb2_to_name); 803 return rc; 804 } 805 806 int 807 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, 808 const char *from_name, const char *to_name, 809 struct cifs_sb_info *cifs_sb) 810 { 811 struct cifsFileInfo *cfile; 812 813 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb); 814 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); 815 816 return smb2_set_path_attr(xid, tcon, from_name, to_name, 817 cifs_sb, DELETE, SMB2_OP_RENAME, cfile); 818 } 819 820 int 821 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, 822 const char *from_name, const char *to_name, 823 struct cifs_sb_info *cifs_sb) 824 { 825 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 826 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK, 827 NULL); 828 } 829 830 int 831 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 832 const char *full_path, __u64 size, 833 struct cifs_sb_info *cifs_sb, bool set_alloc) 834 { 835 __le64 eof = cpu_to_le64(size); 836 struct cifsFileInfo *cfile; 837 838 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 839 return smb2_compound_op(xid, tcon, cifs_sb, full_path, 840 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE, 841 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL); 842 } 843 844 int 845 smb2_set_file_info(struct inode *inode, const char *full_path, 846 FILE_BASIC_INFO *buf, const unsigned int xid) 847 { 848 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 849 struct tcon_link *tlink; 850 struct cifs_tcon *tcon; 851 struct cifsFileInfo *cfile; 852 int rc; 853 854 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && 855 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) && 856 (buf->Attributes == 0)) 857 return 0; /* would be a no op, no sense sending this */ 858 859 tlink = cifs_sb_tlink(cifs_sb); 860 if (IS_ERR(tlink)) 861 return PTR_ERR(tlink); 862 tcon = tlink_tcon(tlink); 863 864 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 865 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 866 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 867 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile, 868 NULL, NULL, NULL, NULL); 869 cifs_put_tlink(tlink); 870 return rc; 871 } 872